mirror of
https://github.com/CTCaer/CTCaer-TWRP.git
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e34c133ec6
update fuse to 2.9.2 catch return from unlink so that we don't print error messages when things work Change-Id: I1115039a0fa5d9d73f78ef1abd79755d7ffd9d96
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
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Copyright 2013 bigbiff/Dees_Troy TeamWin
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This file is part of TWRP/TeamWin Recovery Project.
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TWRP is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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TWRP is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with TWRP. If not, see <http://www.gnu.org/licenses/>.
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This is a write buffer for use with libtar. Libtar normally writes
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512 bytes at a time but this results in poor file performance
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especially on exFAT fuse file systems. This write buffer fixes that
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problem.
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*/
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#include <fcntl.h>
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#include "libtar/libtar.h"
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#include "common.h"
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int flush = 0, eot_count = -1;
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unsigned char *write_buffer;
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unsigned buffer_size = 4096;
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unsigned buffer_loc = 0;
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void reinit_libtar_buffer(void) {
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flush = 0;
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eot_count = -1;
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buffer_loc = 0;
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}
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void init_libtar_buffer(unsigned new_buff_size) {
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if (new_buff_size != 0)
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buffer_size = new_buff_size;
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reinit_libtar_buffer();
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write_buffer = (unsigned char*) malloc(sizeof(char *) * buffer_size);
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}
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void free_libtar_buffer(void) {
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free(write_buffer);
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}
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ssize_t write_libtar_buffer(int fd, const void *buffer, size_t size) {
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void* ptr;
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if (flush == 0) {
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ptr = write_buffer + buffer_loc;
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memcpy(ptr, buffer, size);
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buffer_loc += size;
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if (eot_count >= 0 && eot_count < 2)
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eot_count++;
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/* At the end of the tar file, libtar will add 2 blank blocks.
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Once we have received both EOT blocks, we will immediately
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write anything in the buffer to the file.
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*/
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if (buffer_loc >= buffer_size || eot_count >= 2) {
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flush = 1;
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}
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}
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if (flush == 1) {
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flush = 0;
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if (buffer_loc == 0) {
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// nothing to write
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return 0;
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}
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if (write(fd, write_buffer, buffer_loc) != buffer_loc) {
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LOGE("Error writing tar file!\n");
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buffer_loc = 0;
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return -1;
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} else {
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buffer_loc = 0;
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return size;
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}
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} else {
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return size;
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}
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// Shouldn't ever get here
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return -1;
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}
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void flush_libtar_buffer(int fd) {
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eot_count = 0;
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}
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